What is the most common issue with a Ford Focus's transmission?

I recently bought a used Ford Focus and have noticed some unusual shifting and stalling when driving. I'm worried it might be a transmission issue. Can you suggest any common problems with Ford Focus transmissions that I should look out for?

One common issue with Ford Focus transmissions is a faulty shift solenoid. If you're experiencing rough shifting and stalling, it's worth checking and possibly replacing this part.

Another possible problem is worn transmission mounts. These can cause vibrations and unusual movements while driving, and should be inspected and replaced if necessary.